The Original “Nasty Girls” CrossFit Video (and no, it’s not in fast time – it’s real time)! Post to comments if this was the very first CrossFit video you saw when you were “introduced” to CrossFit:

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How do wolves change rivers?

Wolves are a keystone species, and their disappearance or reintroduction can drastically alter an ecosystem. Their reintroduction to Yellowstone Park caused a remarkable “trophic cascade” that actually altered the landscape of the park.